33138828577 has 4 divisors (see below), whose sum is σ = 33217919280. Its totient is φ = 33059737876.

The previous prime is 33138828571. The next prime is 33138828643. The reversal of 33138828577 is 77582883133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33138828577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33138828571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39544723 + ... + 39545560.

It is an arithmetic number, because the mean of its divisors is an integer number (8304479820).

Almost surely, 2^33138828577 is an apocalyptic number.

It is an amenable number.

33138828577 is a deficient number, since it is larger than the sum of its proper divisors (79090703).

33138828577 is an equidigital number, since it uses as much as digits as its factorization.

33138828577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79090702.

The product of its digits is 6773760, while the sum is 55.

The spelling of 33138828577 in words is "thirty-three billion, one hundred thirty-eight million, eight hundred twenty-eight thousand, five hundred seventy-seven".